摘要:
A semiconductor memory device may have a memory cell array with respective memory cells disposed at intersections of rows and columns. The semiconductor memory device may also include at least one decoder and at least one delay controller. The decoder may select a row or column of the memory cell. The signal delay controller may control a delay of an activation signal applied to the row or column by the at least one decoder based on at least one of a position of the at least one memory cell associated with the selected row or column and a line loading capacitance value of the selected memory cell.
摘要:
A semiconductor memory device may have a memory cell array with respective memory cells disposed at intersections of rows and columns. The semiconductor memory device may also include at least one decoder and at least one delay controller. The decoder may select a row or column of the memory cell. The signal delay controller may control a delay of an activation signal applied to the row or column by the at least one decoder based on at least one of a position of the at least one memory cell associated with the selected row or column and a line loading capacitance value of the selected memory cell.
摘要:
A semiconductor memory device may have a memory cell array with respective memory cells disposed at intersections of rows and columns. The semiconductor memory device may also include at least one decoder and at least one delay controller. The decoder may select a row or column of the memory cell. The signal delay controller may control a delay of an activation signal applied to the row or column by the at least one decoder based on at least one of a position of the at least one memory cell associated with the selected row or column and a line loading capacitance value of the selected memory cell.
摘要:
A semiconductor memory device may have a memory cell array with respective memory cells disposed at intersections of rows and columns. The semiconductor memory device may also include at least one decoder and at least one delay controller. The decoder may select a row or column of the memory cell. The signal delay controller may control a delay of an activation signal applied to the row or column by the at least one decoder based on at least one of a position of the at least one memory cell associated with the selected row or column and a line loading capacitance value of the selected memory cell.
摘要:
A dynamic random access memory device and a &mgr;BGA package for the device use multiple pads for a reference voltage. The device includes n input receivers, n data input pads, and x reference voltage pads. Each input receiver operates synchronously with a clock signal and includes a differential amplifying unit that generates an output data signal according to a voltage difference between an input data signal and a reference voltage. The n data input pads respectively connect to the n input receivers and transfer the input data signals to the input receivers. The n input receivers are divided into x groups according to their positions, and the x reference voltage input pads respectively connect to the x groups of input receivers for commonly applying the reference voltage to the input receivers in the respective groups. Each reference voltage input pad can connect to its group of input receivers through one or multiple common lines. The package includes a first ball that receives the reference voltage. The first ball is commonly connected to the x reference voltage input pads of the device. The average and maximum distances between the reference voltage input pads and input receivers are much shorter with multiple reference voltage pads. Accordingly, the noise level of the reference voltage is smaller, thereby improving a margin in data setup and hold times of the input receivers and the operational reliability of products. Filters connected to the reference voltage pads can further reduce the noise in the reference voltage at the input receivers.
摘要:
A semiconductor memory device having an improved column select control circuit. The semiconductor memory device includes a memory cell array consisting of a plurality of volatile memory cells and a column select line decoder for selecting a column line of the memory cell array. The semiconductor memory device includes at least two different refresh cycle modes designed within a single chip. A mode select circuit generates a mode select signal for selecting one of at least two refresh modes. A column select control circuit controls the enable time of the column select line decoder enable signal responsive to the mode select signal and to row address strobe signal for providing the column select line decoder enable signal to the column select line decoder.
摘要:
A memory device has at least one pair of memory cell blocks, a spare row decoder, a data exchange control signal generator and a data exchange unit. When a defective memory cell in a first memory cell block is repaired with a spare memory cell in a second memory cell block that neighbors (or is adjacent) the first memory cell block, the data topology of the memory cell of the first memory cell may be matched to the memory cell of the second memory cell block.
摘要:
An address converter of a semiconductor device comprises a clock generating portion for generating at least one clock signal when a power voltage is applied; a control signal setting means for setting a control signal during a mode setting operation; a polarity selecting signal generating portion for generating at least one polarity selecting signal in response to the at least one clock signal and the control signal; and an address converting portion for converting at least one bit of an address applied from an external portion to output a converted address in response to the at least one polarity selecting signal.
摘要:
An address converter of a semiconductor device comprises a clock generating portion for generating at least one clock signal when a power voltage is applied; a control signal setting means for setting a control signal during a mode setting operation; a polarity selecting signal generating portion for generating at least one polarity selecting signal in response to the at least one clock signal and the control signal; and an address converting portion for converting at least one bit of an address applied from an external portion to output a converted address in response to the at least one polarity selecting signal.
摘要:
A memory device has at least one pair of memory cell blocks, a spare row decoder, a data exchange control signal generator and a data exchange unit. When a defective memory cell in a first memory cell block is repaired with a spare memory cell in a second memory cell block that neighbors (or is adjacent) the first memory cell block, the data topology of the memory cell of the first memory cell may be matched to the memory cell of the second memory cell block.